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Finding the Fourth Proportional to 13,488.80, 18,606.50 and 10,499.90

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Solution

The fourth proportional to 13,488.80, 18,606.50 and 10,499.90 is: 14,483.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,488.80 : 18,606.50 = 10,499.90 : x
  2. Step 2: Convert to fraction form
    13,488.80/18,606.50 = 10,499.90/x
  3. Step 3: Cross multiply
    13,488.80x = 18,606.50 × 10,499.90
  4. Step 4: Simplify right side
    13,488.80x = 195,366,389.35
  5. Step 5: Solve for x
    x = 195,366,389.35/13,488.80
  6. Step 6: Final answer
    x = 14,483.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.